Struct SimHashFingerprint 

pub struct SimHashFingerprint(/* private fields */);

A 64-bit SimHash fingerprint of a text string.

Implementations

impl SimHashFingerprint

pub fn compute(text: &str) -> Self

Compute the SimHash fingerprint for a text string.

The text is tokenised by whitespace, then a 3-gram sliding window is applied over the tokens so that small edits produce similar fingerprints rather than random ones.

pub fn hamming_distance(self, other: Self) -> u32

Returns the Hamming distance between two fingerprints (number of bits that differ). Two fingerprints with distance ≤ threshold are considered semantically similar.

pub fn value(self) -> u64

Raw fingerprint value.

Trait Implementations

impl Clone for SimHashFingerprint

fn clone(&self) -> SimHashFingerprint

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SimHashFingerprint

impl Debug for SimHashFingerprint

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for SimHashFingerprint

impl Hash for SimHashFingerprint

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SimHashFingerprint

fn eq(&self, other: &SimHashFingerprint) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for SimHashFingerprint